Browsing: The Tech

MANUFACTURER: Comp Cams ENGINE MODEL: 4G63 EVO 8 CAMSHAFT PN# (INTAKE): 119-101-8I CAMSHAFT PN# (EXHAUST): 119-102-83 SPEC CARD# (INTAKE): WA8487-13 SPEC CARD# (EXHAUST): WA8488-13 INTAKE EXHAUST CAM TIMING EVENTS Centerline 104° 112° Valve Opening @ 1.0mm 5.6° ATDC 37.9° BBDC Valve Opening @ 0.050″ 9.0° ATDC 34.6° BBDC Valve Closing @ 1.0mm 30.3° ABDC 14.0° BTDC Valve Closing @ 0.050″ 26.8° ABDC 17.4° BTDC DURATION Actual Duration @ 1.0mm 204.7° 203.9° Actual Duration @ 0.050″ 197.9° 197.2° Claimed Duration @ 1.0mm 202.0° 202.0° PEAK LIFT Peak Valve Lift 11.2mm (0.441″) 10.5mm (0.42″) Peak Cam Lift 6.5mm (0.255″) 6.1mm (0.238″) Manufacturer’s Pitch 264+, Works…

INTAKE EXHAUST CAM TIMING EVENTS Centerline 109° 111° Valve Opening @ 1.0mm 12.5 ATDC 31.25 BBDC Valve Opening @ 0.050″ 15.0 ATDC 27.75 BBDC Valve Closing @ 1.0mm 32.5 ABDC 17.25 BTDC Valve Closing @ 0.050″ 21.0 ABDC 20.75 BTDC DURATION Actual Duration @ 1.0mm 199.9 194.0 Actual Duration @ 0.050″ 193.0 187.0 Claimed Duration @ 1.0mm N/A N/A PEAK LIFT Peak Valve Lift 10.0mm (0.393″) 9.5mm (0.373″) Peak Cam Lift 5.8mm (0.228″) 5.5mm (0.215″) Manufacturer’s Pitch The factory cams do a sub-par job of extracting maximum performance from the engine. Any 4G63 build with even a factory turbo can…

There is nothing as unnerving as blasting through the traps at triple-digit speeds only to find that the brake pedal has turned into a cinderblock. If you have ever been in a car that’s lost the assistance of the power brake booster, you know how “rock hard” and uncooperative the brake pedal becomes when the vacuum source is lost to the booster. Vacuum assist is also used on some vehicles to reduce clutch pedal effort too. Unfortunately, installing a set of “big” camshafts in an engine will significantly reduce the strength of the vacuum produced by the engine. The result…

Dead or dying batteries suck. Did you leave the lights on? Is your alternator going bad? Does that high tech alarm that can start the car and communicate with you from two miles away leave your battery drained after you go away for a week? Or has your once-great battery been sitting on a shelf waiting for you to finally get your project car back on the road? Regardless of the circumstance, batteries have a limited life. However, properly caring for your battery is the best way to extend its service life. Text by Richard Fong // Photos by Jun…

“Impressive” is a massive understatement when referring to the capabilities of Nissan’s R35 GT-R. With highly-tuned factory-engine/factory-turbo R35s breaking into the 9s and highly-modified, big-turbo/built-engine variants in the high 7s and low 8s, the performance potential is simply unbelievable. Today, trap speeds indicate that some of these GT-Rs are putting out over 1,800 horsepower to the ground. The vehicle that was touted at its launch as being “un-tunable” is now the recipient of some of the best-engineered aftermarket products in the world. While not a platform that can fit into everyone’s budget, those that do purchase the GT-R seem intent…

Racers, their tuners, and like-minded enthusiasts have propelled the tuning industry to once unimaginable new heights. Tuners and consumers alike have gained volumes of knowledge. Thanks to reflash tuning solutions for factory ECUs and greater availability of plug-and-play stand-alone engine management systems, vehicle performance has taken great strides. But with strides come greater risks, and the precision of engine tuning can make the difference between big power or big problems. Text and Photos by Richard Fong IDEAL RATIOS For a combustion engine, proper function hinges on the delivery of a proper air-to-fuel ratio. But what is the ideal ratio? With…

Knock knock. Who’s there? Your blown engine. The four-cycle combustion engine has come quite a long way in its evolution and thanks to technology; it has risen to a precise science. Although precision is great, it also leaves little margin for error, especially at extreme boost pressures and high engine speeds. There are any number of events that could occur which have the potential to cause damage to an engine. One of the worst events is engine knock, the not so silent killer of engines. Like high blood pressure and some forms of cancer, early detection of knock can be…

Sometimes tough luck will find you at the worst possible moment. The only thing you can do is assess the situation, formulate a game plan and execute it. Project Silvia’s SR23 presented an unusual hurdle as we prepared for a NASA HPDE track event. During a routine oil change, an unexpected part had found its way into the oil pan. Attached to the magnetic oil drain bolt was the oil jet that lubricates the timing chain. Text and Photos by Richard Fong Small Part, Hard To Access The press fit oil jet somehow dislodged itself from the block and luckily…

As the import performance tuning world continues to set performance records that seemingly defy physics with built versions of the Nissan R35 GT-R, the capabilities of the Nissan 370Z are sometimes forgotten. The 370Z, brother to the only currently produced Japanese supercar, continues to deliver one of the best bang-for-the-buck performance values in the world. However, adding truly significant power gains while maintaining 50-state emissions compliance hasn’t been an option. CARB legal intake and exhaust upgrades might add a total of 10-to-20 horsepower; raising the VQ37’s output to 300-to-310 peak wheel horsepower (if you’re lucky). Bigger power gains previously required…

Race fuel is for racing? Of course it is. Anyone who’s heavily involved in motorsports is likely to have a collection of cars and parts along with a supply of five and 55-gallon fuel containers. But, why does racing require race fuel? Does higher quality race fuel make more power? Absolutely. In fact, race fuels can produce more power and reliability when combined with the proper engine calibration. The tune for the engine must be optimized to match the burn rate, specific gravity, and stoichiometry of each fuel. The ideal ignition timing, air-fuel mixture, and boost levels depend heavily on…

Purchasing an ECU reflash solution is not an option for FR-S/BRZ owners. Instead, it should be considered a requirement. In fact, it should be the first performance part purchased for the vehicle. The reason is simple. No significant power gains can be realized on the FR-S/BRZ platform with the factory ECU programming in place. We found out the hard way. The world’s best intake and exhaust systems will only deliver small improvements since the factory program uses torque limiting tables. Fortunately, there is a solution. ECUTEK’s ProECU and RaceROM packages not only remove the performance shackles, but also provide an…

TITAN MOTORSPORTS TRIPLE PUMP As the only triple pump system tested and the only with a -10AN outlet from the hat, we were very interested in the results. The trio of Walbro GSS341 pumps did not disappoint. Those running 25psi of boost, would have support for over 1,300 wheel horsepower on gasoline or over 1,000 horsepower on E85. For those running 35psi of boost pressure, the triple system still provides enough flow for over 1,100 horsepower on gasoline or over 850 wheel horsepower on E85. The quality of the machining and engineering with this triple-pump solution is second to none.…

SQUASH PERFORMANCE EVO X DUAL FUELER Designed as a drop-in replacement for the EVO X, the Squash Performance Dual Fueler provides impressive performance in a ” no-core-exchange-needed package.” The system offers either -8AN or – 6AN feed with a -6AN return. The system we tested had a -8AN feed. Equipped with the same “262” Walbros as the IS300 and EVO 8/9 systems we tested, we didn’t know what to expect. At the end of the day, the EVO X system was not up to the level delivered by the other Squash Performance systems tested. We do know the system can support…

SQUASH PERFORMANCE EVO 8/9 DUAL FUELER Designed as a drop-in replacement for the EVO 8 and EVO 9, the Squash Performance Dual Fueler provides impressive performance in a “no-core-exchange-needed package.” The system offers either -8AN or – 6AN feed with a -6AN return. The system we tested had a -8AN feed. Equipped with the same “262” Walbros as the IS300 system, we expected to see similar results. Instead, the pumps in this system showed a more gradual flow loss to operating pressure curve, yet the flow performance at lower pressures was less. This made for a real head scratcher. Was it…

SQUASH PERFORMANCE LEXUS IS300 TWIN-PUMP SYSTEM We ran into Squash Performance at the 2012 SEMA Show and were happy to see this new player in the import performance aftermarket. For those looking to go crazy with an engine swap or high-boost engine build, Squash Performance offers its Lexus IS300 Twin-Pump System. While Squash offers a number of different pump options, we tested the system with a pair of “262” Walbro pumps (a.k.a. 400lph pump). The system offers either -8AN or – 6AN feed with a -6AN return. The system we tested had a -8AN feed. The unmodified Walbro 262 performed…

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